复数： selectors

The id selector is defined as a # .

id选择器以“#”号开头。

Using every declaration just once means making strict use of selector grouping .

每种声明只使用一次意味着对选择器进行更加严格的分组。

Unnecessary jquery selector calls causing massive overhead

不必要的jquery选择器开用导致大量开销

You can also define styles for html elements with the id selector .

你也可以用id选择器来定义html元素的样式。

Selector by id is the fastest using getelementbyid

id选择器是最快的，使用getelementbyid